Coupling system between engine head, injector and fuel manifold

Details Coupling system between engine head, injector and fuel manifold Coupling system between engine head, injector and fuel manifold

1999-06-28

2001-07-24

Moulis, Thomas N. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

Reexamination Certificate

active

06263863

ABSTRACT:

The present invention concerns a coupling system between the engine head, the injector and the fuel manifold.
BACKGROUND OF THE INVENTION
As it is well known, on internal combustion engines at present available in commerce the fuel supply to the combustion chamber is increasingly more frequently achieved by means of one or several injectors housed inside suitable seats recessed into the engine head. Such injectors receive the fuel under high pressure from a fuel manifold which extends above the actual injectors.
The focal point of fuel supply groups described above is the connection between the injector and the fuel manifold which has to be achieved in such a manner as to exclude whatsoever fuel leakage. Such a connection nevertheless calls for design details which by frequently causing misalignment between the injector which projects from the recessed seating in the engine head and the fuel manifold located above the head, involves constraints by interposing between the injector and the fuel manifold a connection seal able to prevent any misalignment.
FIG. 1
illustrates a known coupling system between the engine head, the injector and the fuel manifold, in which the injector
100
is locked inside the seating
101
recessed in the head
102
by means of a securing strap
103
bolted into the head
102
. The upper end of the injector
100
is connected to the fuel manifold
104
by means of a rigid bush
105
which has a first end placed on the injector
100
and a second end inserted into the inside of a corresponding seat
106
formed in the actual fuel manifold
104
. The rigid bush
105
is coupled to the injector
100
and to the fuel manifold
104
with a certain clearance in such a manner as to make good the eventual unseating, and is held secured to the fuel manifold
104
by means of a flexible locking component
107
located on the outside of the rigid bush
105
. The seal is ensured by means of two annular packings positioned to coincide with the two ends of the rigid bush
105
.
It is manifest that a connection between injector and fuel manifold such as is shown in
FIG. 1
is extremely costly, greatly complicates the assembly of the fuel supply group on the engine, and finally doubles the number of possible fuel leakage points.
SUMMARY OF THE INVENTION
The purpose of the present invention is therefore to achieve a coupling system of an economical nature and basically more secure between the injector and the fuel manifold.
According to the present invention a coupling system is achieved between the engine head, the injector and the fuel manifold in which the engine head has a seat able to accommodate the said injector; the system being characterised by the fact that the injector is coupled with the seat by way of a ball-coupling which allows orientation as required by the injector inside the said seat.


REFERENCES:
patent: 3412718 (1968-11-01), Long
patent: 4519371 (1985-05-01), Nagase et al.
patent: 4944262 (1990-07-01), Molina et al.
patent: 5682859 (1997-11-01), Wakeman
patent: 2208646 (1973-08-01), None
patent: 19735665 (1999-01-01), None
patent: 0878622 (1998-11-01), None
patent: 2012144 (1970-03-01), None
patent: 448089 (1936-07-01), None
patent: 9931381 (1999-06-01), None

Affiliated with

Also associated with

Rating

Coupling system between engine head, injector and fuel manifold does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coupling system between engine head, injector and fuel manifold, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coupling system between engine head, injector and fuel manifold will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2475221